java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --traceabstraction.trace.refinement.strategy SIFA_TAIPAN --sifa.abstract.domain CompoundDomain --rcfgbuilder.size.of.a.code.block LoopFreeBlock --sifa.call.summarizer TopInputCallSummarizer --sifa.fluid SizeLimitFluid --sifa.simplification.technique SIMPLIFY_QUICK -i ../../../trunk/examples/svcomp/array-multidimensional/init-4-n-u.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 01:37:11,496 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 01:37:11,498 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 01:37:11,510 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 01:37:11,510 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 01:37:11,511 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 01:37:11,513 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 01:37:11,515 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 01:37:11,516 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 01:37:11,517 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 01:37:11,518 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 01:37:11,519 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 01:37:11,520 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 01:37:11,520 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 01:37:11,521 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 01:37:11,523 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 01:37:11,523 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 01:37:11,524 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 01:37:11,526 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 01:37:11,528 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 01:37:11,530 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 01:37:11,531 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 01:37:11,532 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 01:37:11,533 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 01:37:11,535 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 01:37:11,543 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 01:37:11,544 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 01:37:11,545 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 01:37:11,546 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-15 01:37:11,560 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 01:37:11,561 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 01:37:11,562 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 01:37:11,562 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 01:37:11,562 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 01:37:11,563 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 01:37:11,563 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 01:37:11,563 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 01:37:11,563 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 01:37:11,563 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 01:37:11,564 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 01:37:11,564 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 01:37:11,564 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 01:37:11,564 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 01:37:11,564 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 01:37:11,565 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 01:37:11,565 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 01:37:11,565 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 01:37:11,565 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 01:37:11,565 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 01:37:11,566 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 01:37:11,566 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:37:11,566 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 01:37:11,566 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 01:37:11,567 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 01:37:11,567 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 01:37:11,567 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 01:37:11,567 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 01:37:11,567 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> SIFA_TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> CompoundDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> LoopFreeBlock Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Call Summarizer -> TopInputCallSummarizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Fluid -> SizeLimitFluid Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Simplification Technique -> SIMPLIFY_QUICK [2019-10-15 01:37:11,829 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 01:37:11,841 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 01:37:11,844 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 01:37:11,846 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 01:37:11,846 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 01:37:11,847 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-multidimensional/init-4-n-u.c [2019-10-15 01:37:11,902 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4667b0869/4ed4b672f48d4842b5c9235ba34c626f/FLAGb80b46a40 [2019-10-15 01:37:12,332 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 01:37:12,333 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-multidimensional/init-4-n-u.c [2019-10-15 01:37:12,342 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4667b0869/4ed4b672f48d4842b5c9235ba34c626f/FLAGb80b46a40 [2019-10-15 01:37:12,668 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4667b0869/4ed4b672f48d4842b5c9235ba34c626f [2019-10-15 01:37:12,678 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 01:37:12,679 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 01:37:12,680 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 01:37:12,680 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 01:37:12,684 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 01:37:12,685 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:37:12" (1/1) ... [2019-10-15 01:37:12,687 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1a6adaa2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:37:12, skipping insertion in model container [2019-10-15 01:37:12,688 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:37:12" (1/1) ... [2019-10-15 01:37:12,695 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 01:37:12,714 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 01:37:12,901 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:37:12,907 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 01:37:12,931 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:37:13,043 INFO L192 MainTranslator]: Completed translation [2019-10-15 01:37:13,044 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:37:13 WrapperNode [2019-10-15 01:37:13,044 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 01:37:13,045 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 01:37:13,045 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 01:37:13,045 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 01:37:13,054 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:37:13" (1/1) ... [2019-10-15 01:37:13,054 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:37:13" (1/1) ... [2019-10-15 01:37:13,060 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:37:13" (1/1) ... [2019-10-15 01:37:13,061 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:37:13" (1/1) ... [2019-10-15 01:37:13,076 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:37:13" (1/1) ... [2019-10-15 01:37:13,082 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:37:13" (1/1) ... [2019-10-15 01:37:13,084 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:37:13" (1/1) ... [2019-10-15 01:37:13,086 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 01:37:13,087 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 01:37:13,087 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 01:37:13,087 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 01:37:13,088 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:37:13" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:37:13,137 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 01:37:13,137 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 01:37:13,137 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-15 01:37:13,137 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 01:37:13,137 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 01:37:13,137 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-15 01:37:13,138 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 01:37:13,138 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 01:37:13,138 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-15 01:37:13,138 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-15 01:37:13,138 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-15 01:37:13,138 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-15 01:37:13,138 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 01:37:13,139 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 01:37:13,538 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 01:37:13,538 INFO L284 CfgBuilder]: Removed 8 assume(true) statements. [2019-10-15 01:37:13,539 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:37:13 BoogieIcfgContainer [2019-10-15 01:37:13,540 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 01:37:13,541 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 01:37:13,541 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 01:37:13,544 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 01:37:13,544 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 01:37:12" (1/3) ... [2019-10-15 01:37:13,545 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7610028e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:37:13, skipping insertion in model container [2019-10-15 01:37:13,545 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:37:13" (2/3) ... [2019-10-15 01:37:13,546 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7610028e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:37:13, skipping insertion in model container [2019-10-15 01:37:13,546 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:37:13" (3/3) ... [2019-10-15 01:37:13,547 INFO L109 eAbstractionObserver]: Analyzing ICFG init-4-n-u.c [2019-10-15 01:37:13,556 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 01:37:13,564 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 01:37:13,575 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 01:37:13,598 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 01:37:13,598 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 01:37:13,599 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 01:37:13,599 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 01:37:13,599 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 01:37:13,599 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 01:37:13,599 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 01:37:13,599 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 01:37:13,613 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2019-10-15 01:37:13,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-10-15 01:37:13,618 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:37:13,619 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:37:13,621 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:37:13,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:37:13,626 INFO L82 PathProgramCache]: Analyzing trace with hash -463394287, now seen corresponding path program 1 times [2019-10-15 01:37:13,635 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:37:13,635 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813669957] [2019-10-15 01:37:13,635 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:37:13,636 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:37:13,636 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:37:13,711 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-15 01:37:13,712 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1701419056] [2019-10-15 01:37:13,712 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:37:13,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:37:13,781 INFO L256 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:37:13,787 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:37:13,841 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:37:13,841 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:37:13,872 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:37:13,875 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813669957] [2019-10-15 01:37:13,875 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-15 01:37:13,875 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1701419056] [2019-10-15 01:37:13,876 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:37:13,876 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2019-10-15 01:37:13,877 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068563962] [2019-10-15 01:37:13,882 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:37:13,882 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:37:13,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:37:13,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 01:37:13,900 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 4 states. [2019-10-15 01:37:13,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:37:13,991 INFO L93 Difference]: Finished difference Result 44 states and 62 transitions. [2019-10-15 01:37:13,993 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 01:37:13,995 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2019-10-15 01:37:13,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:37:14,008 INFO L225 Difference]: With dead ends: 44 [2019-10-15 01:37:14,008 INFO L226 Difference]: Without dead ends: 26 [2019-10-15 01:37:14,014 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 01:37:14,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-10-15 01:37:14,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2019-10-15 01:37:14,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-10-15 01:37:14,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 36 transitions. [2019-10-15 01:37:14,067 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 36 transitions. Word has length 14 [2019-10-15 01:37:14,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:37:14,067 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 36 transitions. [2019-10-15 01:37:14,067 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:37:14,068 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 36 transitions. [2019-10-15 01:37:14,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-10-15 01:37:14,069 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:37:14,069 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:37:14,273 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:37:14,274 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:37:14,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:37:14,274 INFO L82 PathProgramCache]: Analyzing trace with hash 269738403, now seen corresponding path program 1 times [2019-10-15 01:37:14,275 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:37:14,275 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717723142] [2019-10-15 01:37:14,275 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:37:14,275 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:37:14,276 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:37:14,287 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-15 01:37:14,287 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2058442947] [2019-10-15 01:37:14,287 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:37:14,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:37:14,347 INFO L256 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:37:14,349 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:37:14,375 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-15 01:37:14,376 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:37:14,410 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-15 01:37:14,411 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717723142] [2019-10-15 01:37:14,411 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-15 01:37:14,412 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2058442947] [2019-10-15 01:37:14,412 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:37:14,412 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2019-10-15 01:37:14,412 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043534112] [2019-10-15 01:37:14,414 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 01:37:14,414 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:37:14,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 01:37:14,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-10-15 01:37:14,415 INFO L87 Difference]: Start difference. First operand 26 states and 36 transitions. Second operand 6 states. [2019-10-15 01:37:14,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:37:14,513 INFO L93 Difference]: Finished difference Result 58 states and 88 transitions. [2019-10-15 01:37:14,514 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-15 01:37:14,514 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2019-10-15 01:37:14,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:37:14,517 INFO L225 Difference]: With dead ends: 58 [2019-10-15 01:37:14,518 INFO L226 Difference]: Without dead ends: 41 [2019-10-15 01:37:14,519 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2019-10-15 01:37:14,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-10-15 01:37:14,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 40. [2019-10-15 01:37:14,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2019-10-15 01:37:14,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 57 transitions. [2019-10-15 01:37:14,534 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 57 transitions. Word has length 18 [2019-10-15 01:37:14,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:37:14,534 INFO L462 AbstractCegarLoop]: Abstraction has 40 states and 57 transitions. [2019-10-15 01:37:14,534 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-15 01:37:14,535 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 57 transitions. [2019-10-15 01:37:14,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-10-15 01:37:14,536 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:37:14,536 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:37:14,740 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:37:14,741 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:37:14,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:37:14,742 INFO L82 PathProgramCache]: Analyzing trace with hash -1600313997, now seen corresponding path program 1 times [2019-10-15 01:37:14,743 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:37:14,743 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892333545] [2019-10-15 01:37:14,743 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:37:14,744 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:37:14,744 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:37:14,754 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-15 01:37:14,754 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1213243008] [2019-10-15 01:37:14,755 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:37:14,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:37:14,824 INFO L256 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:37:14,826 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:37:14,845 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-15 01:37:14,846 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:37:14,864 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-15 01:37:14,865 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892333545] [2019-10-15 01:37:14,865 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-15 01:37:14,865 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1213243008] [2019-10-15 01:37:14,866 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:37:14,866 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2019-10-15 01:37:14,866 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089342483] [2019-10-15 01:37:14,866 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 01:37:14,867 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:37:14,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 01:37:14,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-10-15 01:37:14,867 INFO L87 Difference]: Start difference. First operand 40 states and 57 transitions. Second operand 6 states. [2019-10-15 01:37:14,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:37:14,977 INFO L93 Difference]: Finished difference Result 94 states and 146 transitions. [2019-10-15 01:37:14,978 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-15 01:37:14,979 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 26 [2019-10-15 01:37:14,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:37:14,980 INFO L225 Difference]: With dead ends: 94 [2019-10-15 01:37:14,980 INFO L226 Difference]: Without dead ends: 63 [2019-10-15 01:37:14,983 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2019-10-15 01:37:14,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2019-10-15 01:37:15,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 62. [2019-10-15 01:37:15,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2019-10-15 01:37:15,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 87 transitions. [2019-10-15 01:37:15,009 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 87 transitions. Word has length 26 [2019-10-15 01:37:15,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:37:15,009 INFO L462 AbstractCegarLoop]: Abstraction has 62 states and 87 transitions. [2019-10-15 01:37:15,011 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-15 01:37:15,011 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 87 transitions. [2019-10-15 01:37:15,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2019-10-15 01:37:15,013 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:37:15,013 INFO L380 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:37:15,213 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:37:15,214 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:37:15,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:37:15,215 INFO L82 PathProgramCache]: Analyzing trace with hash -225342757, now seen corresponding path program 1 times [2019-10-15 01:37:15,216 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:37:15,216 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455142710] [2019-10-15 01:37:15,217 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:37:15,217 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:37:15,217 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:37:15,232 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-15 01:37:15,232 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1782440619] [2019-10-15 01:37:15,233 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:37:15,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:37:15,315 INFO L256 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:37:15,321 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:37:15,342 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2019-10-15 01:37:15,343 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:37:15,361 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2019-10-15 01:37:15,362 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455142710] [2019-10-15 01:37:15,362 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-15 01:37:15,362 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1782440619] [2019-10-15 01:37:15,363 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:37:15,363 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2019-10-15 01:37:15,363 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757960977] [2019-10-15 01:37:15,364 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 01:37:15,364 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:37:15,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 01:37:15,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-10-15 01:37:15,365 INFO L87 Difference]: Start difference. First operand 62 states and 87 transitions. Second operand 6 states. [2019-10-15 01:37:15,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:37:15,447 INFO L93 Difference]: Finished difference Result 148 states and 225 transitions. [2019-10-15 01:37:15,448 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-15 01:37:15,448 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 42 [2019-10-15 01:37:15,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:37:15,449 INFO L225 Difference]: With dead ends: 148 [2019-10-15 01:37:15,449 INFO L226 Difference]: Without dead ends: 95 [2019-10-15 01:37:15,450 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2019-10-15 01:37:15,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2019-10-15 01:37:15,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 94. [2019-10-15 01:37:15,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2019-10-15 01:37:15,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 123 transitions. [2019-10-15 01:37:15,470 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 123 transitions. Word has length 42 [2019-10-15 01:37:15,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:37:15,470 INFO L462 AbstractCegarLoop]: Abstraction has 94 states and 123 transitions. [2019-10-15 01:37:15,470 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-15 01:37:15,471 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 123 transitions. [2019-10-15 01:37:15,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2019-10-15 01:37:15,472 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:37:15,472 INFO L380 BasicCegarLoop]: trace histogram [16, 8, 8, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:37:15,676 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:37:15,676 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:37:15,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:37:15,677 INFO L82 PathProgramCache]: Analyzing trace with hash -101744677, now seen corresponding path program 1 times [2019-10-15 01:37:15,677 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:37:15,677 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557426544] [2019-10-15 01:37:15,677 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:37:15,677 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:37:15,678 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:37:15,694 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-15 01:37:15,694 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [709543495] [2019-10-15 01:37:15,695 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:37:15,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:37:15,770 INFO L256 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-15 01:37:15,773 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:37:15,813 INFO L134 CoverageAnalysis]: Checked inductivity of 360 backedges. 81 proven. 3 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2019-10-15 01:37:15,814 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:37:15,858 INFO L134 CoverageAnalysis]: Checked inductivity of 360 backedges. 81 proven. 3 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2019-10-15 01:37:15,858 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557426544] [2019-10-15 01:37:15,858 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-15 01:37:15,859 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [709543495] [2019-10-15 01:37:15,859 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1402439706] [2019-10-15 01:37:15,887 INFO L162 IcfgInterpreter]: Started Sifa with 18 locations of interest [2019-10-15 01:37:15,887 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:37:15,893 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:37:15,901 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:37:15,902 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:37:16,056 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:37:19,776 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 37 for LOIs [2019-10-15 01:37:19,791 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:37:19,799 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:37:20,827 WARN L191 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 52 [2019-10-15 01:37:20,907 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-10-15 01:37:20,907 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 12] total 22 [2019-10-15 01:37:20,907 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44804049] [2019-10-15 01:37:20,908 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-10-15 01:37:20,909 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:37:20,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-10-15 01:37:20,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=362, Unknown=0, NotChecked=0, Total=462 [2019-10-15 01:37:20,914 INFO L87 Difference]: Start difference. First operand 94 states and 123 transitions. Second operand 22 states. [2019-10-15 01:37:21,630 WARN L191 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 41 [2019-10-15 01:37:22,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:37:22,582 INFO L93 Difference]: Finished difference Result 269 states and 390 transitions. [2019-10-15 01:37:22,582 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-10-15 01:37:22,583 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 58 [2019-10-15 01:37:22,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:37:22,584 INFO L225 Difference]: With dead ends: 269 [2019-10-15 01:37:22,585 INFO L226 Difference]: Without dead ends: 186 [2019-10-15 01:37:22,586 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 145 SyntacticMatches, 9 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 442 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=280, Invalid=910, Unknown=0, NotChecked=0, Total=1190 [2019-10-15 01:37:22,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2019-10-15 01:37:22,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 183. [2019-10-15 01:37:22,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2019-10-15 01:37:22,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 229 transitions. [2019-10-15 01:37:22,650 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 229 transitions. Word has length 58 [2019-10-15 01:37:22,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:37:22,650 INFO L462 AbstractCegarLoop]: Abstraction has 183 states and 229 transitions. [2019-10-15 01:37:22,650 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-10-15 01:37:22,651 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 229 transitions. [2019-10-15 01:37:22,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2019-10-15 01:37:22,659 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:37:22,659 INFO L380 BasicCegarLoop]: trace histogram [48, 8, 8, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:37:22,863 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:37:22,864 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:37:22,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:37:22,864 INFO L82 PathProgramCache]: Analyzing trace with hash 387426779, now seen corresponding path program 2 times [2019-10-15 01:37:22,864 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:37:22,864 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059175042] [2019-10-15 01:37:22,864 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:37:22,864 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:37:22,865 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:37:22,878 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-15 01:37:22,878 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1976611740] [2019-10-15 01:37:22,878 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:37:23,075 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2019-10-15 01:37:23,076 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:37:23,078 INFO L256 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-15 01:37:23,085 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:37:23,185 INFO L134 CoverageAnalysis]: Checked inductivity of 1624 backedges. 361 proven. 21 refuted. 0 times theorem prover too weak. 1242 trivial. 0 not checked. [2019-10-15 01:37:23,185 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:37:23,286 INFO L134 CoverageAnalysis]: Checked inductivity of 1624 backedges. 18 proven. 364 refuted. 0 times theorem prover too weak. 1242 trivial. 0 not checked. [2019-10-15 01:37:23,286 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059175042] [2019-10-15 01:37:23,287 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-15 01:37:23,287 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1976611740] [2019-10-15 01:37:23,287 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1879014459] [2019-10-15 01:37:23,291 INFO L162 IcfgInterpreter]: Started Sifa with 18 locations of interest [2019-10-15 01:37:23,291 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:37:23,292 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:37:23,292 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:37:23,292 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:37:23,338 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:37:25,388 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 37 for LOIs [2019-10-15 01:37:25,394 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:37:25,396 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:37:26,198 WARN L191 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 37 [2019-10-15 01:37:26,443 WARN L191 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 52 [2019-10-15 01:37:26,495 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-10-15 01:37:26,495 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 12] total 30 [2019-10-15 01:37:26,496 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995809739] [2019-10-15 01:37:26,499 INFO L442 AbstractCegarLoop]: Interpolant automaton has 30 states [2019-10-15 01:37:26,499 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:37:26,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2019-10-15 01:37:26,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=654, Unknown=0, NotChecked=0, Total=870 [2019-10-15 01:37:26,501 INFO L87 Difference]: Start difference. First operand 183 states and 229 transitions. Second operand 30 states. [2019-10-15 01:37:29,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:37:29,356 INFO L93 Difference]: Finished difference Result 514 states and 732 transitions. [2019-10-15 01:37:29,356 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-10-15 01:37:29,356 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 90 [2019-10-15 01:37:29,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:37:29,359 INFO L225 Difference]: With dead ends: 514 [2019-10-15 01:37:29,359 INFO L226 Difference]: Without dead ends: 346 [2019-10-15 01:37:29,362 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 291 GetRequests, 233 SyntacticMatches, 9 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1008 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=660, Invalid=1890, Unknown=0, NotChecked=0, Total=2550 [2019-10-15 01:37:29,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2019-10-15 01:37:29,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 343. [2019-10-15 01:37:29,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 343 states. [2019-10-15 01:37:29,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 421 transitions. [2019-10-15 01:37:29,411 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 421 transitions. Word has length 90 [2019-10-15 01:37:29,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:37:29,411 INFO L462 AbstractCegarLoop]: Abstraction has 343 states and 421 transitions. [2019-10-15 01:37:29,412 INFO L463 AbstractCegarLoop]: Interpolant automaton has 30 states. [2019-10-15 01:37:29,412 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 421 transitions. [2019-10-15 01:37:29,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2019-10-15 01:37:29,413 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:37:29,413 INFO L380 BasicCegarLoop]: trace histogram [112, 8, 8, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:37:29,625 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:37:29,626 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:37:29,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:37:29,627 INFO L82 PathProgramCache]: Analyzing trace with hash -937886245, now seen corresponding path program 3 times [2019-10-15 01:37:29,627 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:37:29,627 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334696845] [2019-10-15 01:37:29,628 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:37:29,628 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:37:29,628 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:37:29,650 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-15 01:37:29,651 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [520293124] [2019-10-15 01:37:29,651 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true